Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01d3278f505eef89d1b16641b008265ec27ed8dbb0e725cd0b434b71bb3cf535' 
  AND token = 'iQfS2WpcfesokkS8n0biSfS1e0FFCXioxZ+GBxjGlBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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