Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7c2cc367778d84354a3fb4b41efb9a41612862348c7c78fc4679de1e22e7341' 
  AND token = 'InfvmFQVvU1x91AVwRmv5YDuBrBDdI9E7SY07o4RJf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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