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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '928dd74b9b5b03d11e9198ab14ec438c5a671157a12b238df50d0789b5a021c5' 
  AND token = 'Q6LjWQ3oxZOKSY2ON5LjP4sLRcjmE9dL+3XfzTmJh/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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