Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37621a0f872c5c441f6553acbb8c8571355e8416f47de9e7507e4e9505cb2089' 
  AND token = '+IWOn55RRjsOyM7sd3D9o0S0CXW6XnjbnBbouTSsquU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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