SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bcbefe21c9f498d6ccaee63e6adceaeb6065ec825a9f362f131bf44d618cc5e3' 
  AND token = 'kvTI2s5yNM/3Q+uFg4SD+wvWgz0KJZym1hYBxudx0G8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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