Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd82bbc4956fbdb9186a08ff7bd05c8bc68359044a18761274829d9de6aa9a8c' 
  AND token = 'WLQr2B9Q3RdyBgiQG4hsFyQNcndtWw3KbZhrXidd+q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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