Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda623519ea10be017ffa360952d651dd16bc4d59c6e3859011a0d3b10af7b7f' 
  AND token = 'Kewn2NGsV9VV1IP5XDWOZRLmtFmB+JXe4UwdphoDFw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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