Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57e9249eb251454b94220c63aad983e7955d42ec5f95597c96eabe4f07b91a38' 
  AND token = 'Ui+l2f4Tj0DrC73tGSrS/QVjs54gVuLIbVxfJ7aMDPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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