Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '140948286bebdef354d12f2e66ce3ab1152eff2973ff4c323c9922a92d7bd203' 
  AND token = '2SA68jUhN5O2vTIJPwz6v0NcI3Zo5aMNVizGr+8Ws4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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