Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd171b9529267d244d9d9d66672536e650f62a2c042a22c9f41d9014d30a54d65' 
  AND token = 'eYDY9o4/pNiRYaYU9OWRskxPDYx9ypc7BcIhF3MdhXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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