Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92869bbdadb38c5c1b9e5a0cb43980c3070c4903a73e0ab32a12242bb1674b4a' 
  AND token = '5HuMLcwbfx29IvIudD9yfZyt7nSUBog9SRtwtcO+PWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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