SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f4b5de4c4dd8cd4304acf0429f2933b6c5968250f7c2a5b1d279fe6b9f1187e' 
  AND token = '3Mg+aUzML2mfjvDZLYO71cCAuwulLbNr6/OF4V/VWds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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