Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b03e8673e4cdbe92c44d782dbb2020575e5b672a89437b873a5cab4d31eaa59' 
  AND token = 'GHVbYTRArh94wJM1uMWhM4T/WE0wrwXNz1RsiRbeI4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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