Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba1395e5120a1feca128bb2d2f0b9b7edd7fe4ef3f9ad3edc4e7f2202eae1218' 
  AND token = 'OJQoUBOM0b6oYva+AmBkQPVe5xv/eSuG5DK+DJjIeN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}