Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70dc467fbaaacbbacbbfcfeb1f7ea3580b0f2ad6b6c5253493d09c56e2d9dabc' 
  AND token = '/6v9X6T3j01fWTl7UjDzL2HG48rHz7I3yeJGJ9fSdd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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