Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db4e83fb3f7dc49cf49dd430cff45fdbe33d60db75425ff1363e5a1cc540e243' 
  AND token = '158n/GaFRV7pjCyOw4BwzBVaDEUpHX3idOyMMEE2Gdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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