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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d5488024884ebd2c55bbf4a60bbe80489468b0011c878e6a3ab6b84a8f6c96f' 
  AND token = 'QODErDeLWm0WZ28KW+7SH7iQUC2jFeog43QQB/K58/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}