Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '009685712c4411db99ffdf6aa624810151ab38d323438dfe7e984c1129ca2c59' 
  AND token = 'A455euTS8TMwL0uP4rkEWReofJsRqolLfGAqh4Ytwzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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