Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '316f36447f32678e12401386c1e4454f6e195b863c214184635e964da146d326' 
  AND token = 'qxHRP5Az+CRPcEzooys100BzjEWadH2lCW2vQlkplPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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