Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '638f203e5ba0bd582b9f8a4ac5190ff6a7b65533b389e0822bcebce90f4b8d72' 
  AND token = 'kyX/BH85dT3pwo10DBATkHG8ByiN06QmbJOT0W+imPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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