Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2acff3a0bb08f354dbc3d3c119806cc5bfe24bc11ddb049c477af504deeb86a1' 
  AND token = 'lyhL/ZfBey06ajs8szoi2Lb2o6twAXljH845YxIC9fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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