Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64d8ced1e3305a713b851f97c9d8a05aa7e1fe6ca1158bf2933f5c7704d943c6' 
  AND token = 'q/eqQrELWhOAQTEEWJ5vWTirQDwOEJzibR6hzR7prco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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