SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a644cdb629d9f399152fe910044d4438812e5d8792479fdaf71338410b560eaa' 
  AND token = 'CcJt9kGWwy5Od7w8Wv7hG1mvkbwJ16t/jeiYqoQRHKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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