Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77f56073a8ff4e16a393e83c65233902f76b51ad875c7d29c73fbb9cd7d8f947' 
  AND token = 'obxd5EgMTRS43usrFj0xqi7VnKhcAVPfmYZG7e3jAPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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