SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63152e3cda25017bbb5c22d1c5f8721979cdfe86ae5dfd5f7961e5e5695597c1' 
  AND token = 'XjUCRSZtzsIHufmnJuHB0sbigI6veQ9Yoch8GjHXP7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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