Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '763115e1da818855061f545a9f14a15a65b8bc38a39821a6eadacef2dc426db4' 
  AND token = 'salcIKMeXfbLE34dWTK7kR6HkKT4RcVMmWEZDAznVok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00083

JSON explain

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