Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4713092e60d4e71d083704a3bddbf1fbecdb924bfe205f6a3c2a712fee6fee51' 
  AND token = 'Efmwhk9ZWx6SZ3a9tOni2ZJOutBohi5MvfuBTk5m0oI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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