Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd3d6f20fa760c5e1afc90b72d199d1afc7eee0358b672f1989557b3a4d1a2d6' 
  AND token = '08EfET9n2eZ8wZER5D58Igs1dTVu8DKSbp1WR42Iow4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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