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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd77e54ac8f43dd0963c0883364ed792e12c35c6cc4b564c16db8cc28c5d43a6d' 
  AND token = 'FznICH7r5wwvCK5D32S6WB8BxsKlkCSLaQuYLmItZkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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