Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5319f599408ac45e416d981837bc6250ddaa02276de42906c8ea7963a07944a' 
  AND token = '4dRu3JODmE9KuPJ1ciestnbASFmQSpf42fgUf42MLlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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