Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a178618b199844484b4db6b218d50cb6c82b63b88429dbd0212eebb8c72daaf' 
  AND token = 'j2A4hEGZk3VKohodNZCQ1w7FmNIv+FHNns8EY0/xET0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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