SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0281d7961925adb6e8127f71e40a05b5813e9a8237216b30e69dcc2e862fc94e' 
  AND token = 'Y0vPDoaJdW/ZgBAGcPf4jgVePojHpzQtNXxqHFif1WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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