Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c67228cdc3f0c64b870b25227f91047685e4ebaa107e3131f0e0683ae0f2e9c8' 
  AND token = 'vJA/oHHDE+yw+MuF0fh8aA8xdVnF6EV+BnQo3I/TE74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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