Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '800adbaf0baa8a0ddff602593e2203283c9bd4bff818d5ed80ff4c92275c9aa3' 
  AND token = 'HFXEFBkKjRaR4+/Ff6GrR0zNy4DCcuHDqKjQryI6c98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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