Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be46459855dfe761454299ee39b6554a3b3fd19f050d978b343fa945cda07b66' 
  AND token = 'SwSCoCWTHULQDGn8yiD/3lYTN9q7RhxGmef4LwGzxvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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