Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ce38dcb850f4fd59473f199d18e631e9d9002d88ac136e09838bba561e0891b' 
  AND token = 'f/T2QK6HUuS9wW0zv6Wpp6nBycqZUbBIh5DTPLRfr1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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