Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd58242d26a88bbf822c9f3b17448a53f4b8bbd5fa8b95e7219ac483584e23b42' 
  AND token = 'DLNAfzOgURzi7WcQK9NYcoSdoAfSgD8wtJKkOCaGNGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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