Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e409782dd01ee549530d85dce5d722c6f377b6b728302e55ddc6d35b2de78ee' 
  AND token = 'Lt6OBTPk68HdU5QgG61d6KNC4BYQwioI+oRz99C98C4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00081

JSON explain

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