Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0227693bd96a542e5770ee9980640e4d855c4b9f9b0d6045788de6ab9904abf6' 
  AND token = '10HBgCe1W9R755paAnd3uo3JSR8LHFhps4qHmOgWzHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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