Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7674df175bd43ba7e10297e2dfcca16e814e169401c70280ee4704699daed89f' 
  AND token = 'yDZdu3k9Czuw691Ky+OCtxggZ4Mlp7g8FEol5Oy9tRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00114

JSON explain

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