Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e052556262605677cdaaa2f63951c0c80f83da72b1ad1525594f22329d90b535' 
  AND token = 'rwkHtQMIlWxcEnSLM1lTQL8Bn0D1Pr6FUuwPZTcCFec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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