Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9b865fe756f72ff4b3364a6919622f6e892d19366cf27b89099ca04a8a0ecc9' 
  AND token = 'zTolcjV68UzsQJjeiPq7xNTOBDOMNq/MCVgdU9mVGjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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