Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b81070cf310f2b26862e304b771cdf5261c47b46606c7774fc68a6a9292bca6' 
  AND token = 'YqE4gp9gMmcEWr7QGFnt9DD9kd6+OBu/3i7PYzSpLTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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