SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05eed40dc7ae954af85b5899325266cd3de2ad217f985a42c67786b918cc1fe2' 
  AND token = '5GeVfluQdKvsJgUvhfbNPFAsfvnZEmWrHvGvsZNN7KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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