Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b81b084c2b291fc700497be933954f393bc3efe20a35a4c20b8624b305c149fb' 
  AND token = 'Xmyv4DF7oo5RhqhIHl5ZO/t/tbsA+Y6OCSsrQlpK13w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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