Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22051ecac7c4c4a433994fdfba0f273d986d3b99f072495e0ba9086ef312d4f6' 
  AND token = '+vFs/eGtCfuYrqTNrSRc1A/1i9mWUi6SVtXG8ou7IJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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