Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e49958b89c553208ec14dfe35a4fbe85f00baec0cd66f9a14647fb332dc1c07' 
  AND token = 'ErXvIEcfW5FCBcUHQWHdugSrgNBUFqbQ6XE0P88sOSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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