Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c9e3fca57e8c12379e6a5f6708b71baf59723ff0089f5f208d6517e91907737' 
  AND token = 'DUcToCx0UD+NlwMeUK1h5HuNuVb4Od+CzCIlLZGxkyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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