Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b4b5a1a9b326316206006a2230d3fa50804d8ae438323d55e5cfc10b95aac14' 
  AND token = 'ZmJSu3dvWfvM855N9ZOhXr1d11Gr4MTqKy9Th+6vLAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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