Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d9978f0dc08bfb02f998d62313615cab9a161ec2153df5031766ce40ec71c4e' 
  AND token = '1wsEtqIW69Z3gKt6nLBXg69TRMIscXZm85MDMxj2DaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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