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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '280313b30e43ad26862ed29419d5faaaf850b9a1ee90dcdc19a0bcf12e00eb58' 
  AND token = 'XvVjK2gP7221NWTX3ysOM9I06leFZggFxEnghalPn88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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