Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af7fda4407baed710764231b89a0f09774453aaac1f08cd42a0d078dc052a263' 
  AND token = '0kSlRZhxjUYW0zEuhAZlwGBQC036kw2g33PQbYenzaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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