Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd906a52247ed627950f634833da0e6039270ae98dbd18010e728cb931d3a06b0' 
  AND token = 'eWHt608j8IiSl0VzOo1F5UoiX+QsBNP/cYolNPnki8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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