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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf846e05f52fb9467920459205feaf8a39c5beb456b3e27f20186e9c3e4ad010' 
  AND token = 'y1V9+Mb1QUpoCY9VsjAf1FUvggn7fk0ftQKacTd7qBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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