SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90f8351560fee5fe8a50de7cc64785dabc36171bb118230df946bc083723b14f' 
  AND token = 'vOYPnBFhZDwQW7gWFm3X3wkbTVG4FHEb5ReaDIYbkZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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