Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b260530f33b6cf8eff8138f7aa1ef449a30ab0956b8ccf7062cc0fc37ac33345' 
  AND token = 'VYJFYR1A3vK2NB3sUL2jBnEn9NOElftjDR9A/3u/7l4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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