Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8499778dde9f6fa64f998fb259ee7af25c189d9fbfab129f13b6063cc584ba93' 
  AND token = 'CdeVtRBLXfwgHAx9eIvBaGuiyNyqYYD+Vas1Y/n4ffY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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