Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82b98b56e893df407e50a0f450e912d701b0fe466d1edb9ccaf63b79de8bdc71' 
  AND token = '2oYaYdU7dvmf5Qtl7fq0F+nqXzHlbAvkG+F+AOFktwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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