Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ec49adaac3f55ff5737a903a1f6ff19520abab955ea761debebafbb8a5289b0' 
  AND token = '9wN7crYITh+PkPm8xlL0atg2JbcGx9cXcp0yoyReuas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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