Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ffd42304f6879d2c524b7b994c0ea9b9490c0f73603f0464366ada01c1fc026' 
  AND token = 'mlbmEVueQSvH16o0+gE3DfzO+c0Byp/pckCxIpt301U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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