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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aaaa779932b7c7680010d0a9ec71833ea809689479d3e5d88d5f459d29c77be' 
  AND token = 'XYZou4t9YXFNDyA7bozeJrNenbgBC4t5HZXGeO69vdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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