Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33915a7d0da1cadc8e15521521dcea9eaf4f8c49c4885f2e7481da8e57fd2cfb' 
  AND token = 'zONAIwb1MZknb/5sx6jxWpBEuPjAPpnXs45QwjhwQ14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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