Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01351614303988c1e2edf7e16438ce8886fee158d79c8cb788c4edbeab0e7a1c' 
  AND token = '/pj+fNq94fjCktobV355tx3Jz9VZPdon3Uw+Et/IPok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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