Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3926c9ef58a714e8771cf090bf488c7eb2c9c7bd1e7795e16e2c5611419c75af' 
  AND token = 'l6N/2NllJapffW7vhKOAVWuvg6bw8la/somp7DxHgJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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