Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4adcb19b641663cf87150b659a6839b9f0f5a491011420f033f63bdd0760aacc' 
  AND token = 'mMqCXYphuOahrvx9kCycloNMnTmGHSg4CvNy4BA5bks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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