Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f142b0e77b4cfe191c629ad7bb28d0a76a3404eefc035f8e381dfe095bbc7097' 
  AND token = '5rju9W7CavU82fnVGrnmL+51ggzadm2BLgad0eBRtZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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