SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60aee1153c1f09579b48f671691244156189969e33e0531c57862b728d39be06' 
  AND token = 'bovrkf1FanX9ba2hvQq8Ek/Tgi4JMjuMwtGoLYHKrE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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