Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dab536d8543ad279f5a691ce5da248d7c811ab96e5a830c42062497d1b291e6' 
  AND token = '/n4X4m8rHTewlsBKq1v3one7caBtnBY7G2sEGCZN+4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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