Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '365874322b70f71e722584aa517ae5c4a833c426867f402da6a91c4c5ca792a9' 
  AND token = 'OBBHJgGVtMOa6FaD5P060Pzkij9ams+FVijmB7qM27s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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