Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ef8a3577eb5c654f9a2d7fce190df0db3c14c61a3744cb9b31d1b3ba179b3b0' 
  AND token = 'X439s+SaR7oQfEVmecHddsR2F7shdlJDkJfWPZEEjvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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