Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c31c0ff5cea8ee2b1774368f358f20cea11adf62bfe13f3fe5fa6a945e554024' 
  AND token = 'ugYEGxCtYBSDDanzDYc2/eVHrbExFF6LB9VbiOGyhF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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