Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1eee6e20b62ad58890ecfda8a557dbc52260943ea7a672bb547b90cacd7b7b9' 
  AND token = 'K0BS2BUb23yyd3g80HOauE1i0a2MFwnu1mdFU0WhHFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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