Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6885f0f3310a2682edbeae94461a7feb0a3d4a81f0340686b20de85b39ca7910' 
  AND token = '3kCQakCUKOrMqQAlaG3evleq4XqHetMhvT6NfbXCO/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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