Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ade11b0d63b83e7bb5f97154e6cdbad34c56ffd3fb6341faa00b9cd173ad16ba' 
  AND token = 'UN9qa4W/f27Uq9V/6AdwRcrOv45q5l7i6p4/7a9RrPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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