Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98defbe1c3cd436096053e26ff673283f641d59e01babcd87f76c045238ce356' 
  AND token = 'gPCBMYqeml8HsjK45b5tL8BYDGF985kuB2c0gGv42UE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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