Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df6eb353c7aa415efe8f3b42910c0f8e254d1a201b9c448b69b1a3c6e7d6532a' 
  AND token = 'J7FGQad80EvUE9WW1lJXNUnBGhnORn1k0xAaMKzcyTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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