Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c97b2e0f6a9b845a4b54d13723a4d8de563908a5b698cb87e7404581c83a4ed0' 
  AND token = 'JBL4v8pQDLfEfAWKze46gCS1scB/V8oN/AzdFdbiyKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}