Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c37002d982ec9d924f0ff874654fc9187efcd33526748af7ba685f3d231d444' 
  AND token = '6Mr1omY7be8vLaneOZ8xVItbat1SXs2Glrt7a/nciAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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