Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66dce26073dcb8ce3d2076c9bf0b9976ecd3183b85938e4a6ffca39cf02e2f85' 
  AND token = 'RBqIaqYyK5t9QuXR0WSOvrdNtIOwb1tUKj0+ogA/vZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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