Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11403b7b70549888255d211e8dff945d9f05a449ecf0eb1b10deee8c88a19789' 
  AND token = 'BI85J683kR9ZtpTbnqFoJ45VFj/bQMvFVPwx6C31MU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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