Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1097e94ae0f71917cba701fbdb18426d103ba77c3013166f5d812a8211b88e0' 
  AND token = 'FQBricQQcL3YC3Byh+58dy90p+qxIVddq5U4oDo7Cus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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