Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e524d01fb209dd7a95b9d035730c9363ad0ef0d7c6723c9615bc94525233872d' 
  AND token = 'wmpHrnlxleiyGMhCSs2Xt/+Mp9hyKjKXu78za0gb1Wg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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