Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d494b57b47651cca4ddc08ed6add079f2ac660fe0743ab97452b3819cbc6d3e' 
  AND token = 'JxZ4ZzEL+nE8HITei24S0f1OYEEhfihG6Js5P3qwViM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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