Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cb77584b97ffe41256708b806b72fc7e4786bdfafc68d49d6b5cb4722980b24' 
  AND token = 'szbcns+fHHPHUMM4RBtlUyeFup3ddiCvidKoEXbrWVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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