Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf6c5cc827d7689379c74e48bc85be5bd34c22ec9862b79b04add1ec3e2f9ad' 
  AND token = '1k3mvuAVod6bmb4wT1Sr7Y778VP/14jK1g2tEIhJ63s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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