Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce5e6190040c2271f19585ccd89c342a7fe83d4f095b3fe3850676d98bf946a9' 
  AND token = 'kSFgms9udZTdW4NDvIBCQL3tUpKc0HCA7/6DFmgXU4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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