Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2b8972db699ff52d45c2d4df774a1305dcefaa90fe35beed489ba1af86b13860' 
  AND token = 'b4xgjIPfM2PaKbMtKsRNoCf86+waLwJw+NVlaRnM49Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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