SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f79e670832b5170fb6285e8f6ba9d6dcb1cd5b3ce30cc5889b3f0d59ade1924' 
  AND token = 'hRaUVjqR/6HAFG763jeSYRiwq+r3GcvphC+lPOVXhmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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